WaE: enumeration values 'USCRIPT_CAUCASIAN_ALBANIAN' and
'USCRIPT_MAHAJANI' not handled in switch [-Wswitch]

With ICU 4.9 there is no major/minor anymore, it's only ICU 49 or ICU 52.
So adapt the previous check, too.

Change-Id: Id938937b305165d407ced473ea1725e97efe9124
See: http://icu-project.org/apiref/icu4c-latest/uscript_8h.html
Reviewed-on: https://gerrit.libreoffice.org/6365Tested-by: Caolán McNamara <caolanm@redhat.com>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>